Quantifying South Africa's crude oil import risk: A multi-criteria portfolio model

A major consequence of South Africa's strong economic growth since the democratic dispensation of 1994 is the rapid increase in domestic demand for oil energy. With small amounts of proven oil reserves, the rise in oil demand as an energy source has resulted in South Africa's growing dependence on external sources for its domestic crude oil needs. High oil prices, instability in major oil producing regions and the rise in ‘oil-nationalism’ are major concerns for the security of South Africa's oil supplies. Accordingly, a comprehensive understanding of oil import security risks can serve as a vital guide in formulating any energy policy framework(s) aimed at alleviating the impact of such risks. This study utilises portfolio theory and develops an empirical framework to provide quantitative measures of systematic and specific risks of South Africa's crude oil imports over the period 1994 to 2007. The paper examines the relationship between supply sources diversification and oil energy security risks, and provides an objective evaluation of different import adjustment strategies on South Africa's total crude oil import risks. The results show that a policy of having constant monthly imports from each supply region reduces the specific and systematic risks of the oil import portfolio by an average rate of 71% and 2.9% respectively. Significant reduction in specific risks of South Africa's oil imports is achieved if imports from risky regions (mainly the Middle East) can be diversified to relatively less risky regions of Europe and North America.     

FISCAL ILLUSION AT THE LOCAL SPHERE: AN EMPIRICAL TEST OF THE FLYPAPER EFFECT USING SOUTH AFRICAN MUNICIPAL DATA1

While South Africa operates a relatively decentralised governance and administrative structure, an important feature of the country's intergovernmental fiscal relations system is the gap that exists between the expenditure responsibilities of sub‐national authorities and their assigned revenue bases. The resulting vertical fiscal imbalance is mainly addressed via significant intergovernmental transfers to provinces and local governments. This factor presents strong a priori grounds for assuming that in the South African context, the heavy dependence of many local governments on intergovernmental transfers may generate fiscal illusion. Despite this, there have not been many empirical studies of fiscal illusion in South Africa's intergovernmental transfer system. This paper extends existing literature on fiscal illusion by using the fiscal year 2005/06 financial and expenditure data from 237 local government authorities in South Africa to evaluate the flypaper variant of the fiscal illusion hypothesis. Empirical results indicate that the marginal effects of municipal own‐source revenues on local expenditure exceed those of intergovernmental transfers. No statistical evidence in support of the flypaper hypothesis within the context of municipal expenditures in South Africa is found.